The decomposition of can be followed by titration with and is found to be a first-order reaction. The rate constant is 4.5 × 10^-2. In an experiment, the initial titre value was 25 ml. The titre will

Question

The decomposition of $H_2O_2$ can be followed by titration with $KMnO_4$ and is found to be a first-order reaction. The rate constant is 4.5 × 10^-2. In an experiment, the initial titre value was 25 ml. The titre will be 5 ml after

Prashant Kotian · Accepted Answer

Correct answer: B. For a first-order reaction: t = 1/K ln(V0 / Vt). Given K = 4.5 × 10^-2 min^-1, V0 = 25 mL, Vt = 5 mL. t = 1 / (4.5 × 10^-2) * ln(25/5) = ln 5 / (4.5 × 10^-2) min.

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